Rinse-off skin care compositions containing cellulosic materials

ABSTRACT

The compositions and methods of this invention relate to a rinse-off skin care composition containing hydrophobic, linear cellulose particles having an average length of from about 1 to about 1000 μm, a particle aspect ratio from about 1000 to about 2 and a thickness of from about 1 to about 500 μm; at least one cleansing agent selected from the group consisting of a saponified fat and a surfactant; and a cosmetically acceptable carrier.

This application is a continuation-in-part of U.S. application Ser. No.13/673,477 filed Nov. 9, 2012, the complete disclosure of which ishereby incorporated herein by reference for all purposes.

FIELD OF THE INVENTION

The compositions of this invention relate to rinse-off skin carecompositions containing hydrophobic, linear cellulosic particles thatreduce the presence of oil-related substances on skin.

BACKGROUND OF THE INVENTION

Oily skin is shiny, thick and dull colored. Often, chronically oily skinhas coarse pores and pimples and other embarrassing blemishes.Furthermore, chronically oily skin can be prone to developingblackheads. In this type of skin, the oil-producing sebaceous glands areoveractive and produce more oil than is needed. The oil flows out of thefollicles and gives the skin an undesirable greasy shine. The pores areenlarged and the skin has a coarse look. While oily skin is common inteenagers, it can occur at any age.

Generally, individuals having oily skin attempt to treat areas ofoiliness in order to prevent outbreaks of acne and to diminishshininess. The conventional treatments available include soaps orsurfactant based cleansers, astringents with alcohol and clay or mudmasks. Oil absorbing materials such as clay or salt have also been usedto attempt to treat this condition.

Individuals having oily or shiny skin conditions prefer a treatment thatcan remove the shine without drying the skin. However, there is a lackof effective skin care products on the market today that address thisconsumer need. Oil absorbing powders such as silica, aluminum starch,and talc have been used in the cleansing products to help dry the skinsurface oil, but they also tend to dry the skin and oily and shiny skintend to come back quickly, usually in two to three hours.

Such benefits as reducing the appearance of oil on skin are particularlydifficult to deliver out of a rinse-off composition such as a cleanser.This is due to the relatively short contact time between the applicationof a cleansing composition to the skin and the activity of rinsing thecleansing composition off the skin.

Thus, it would be desirable to have compositions and methods oftreatment that address the condition of oily skin while keeping skinhydrated.

SUMMARY OF THE INVENTION

The compositions and methods of this invention relate to a rinse-offskin care composition comprising hydrophobic, linear cellulose particleshaving an average length of from about 1 to about 1000 μm, a particleaspect ratio from about 1000 to about 2 and a thickness of from about 1to about 500 μm; at least one cleansing agent selected from the groupconsisting of saponified fat and surfactants; and a cosmeticallyacceptable carrier.

DESCRIPTION OF THE DRAWINGS

FIG. 1 is a graph of Infrared spectra of various cotton particles andcellulose.

FIG. 2 is a graph of Infrared spectra of various solvent extracts fromhydrophobic cotton particles and dimethicone.

FIG. 3 is a graph illustrating oil absorption rates of hydrophilic andhydrophobic cotton particles.

FIG. 4 is a graph of the speed of water absorption measured from varioushydrophobic and hydrophilic cotton particles.

FIG. 5 is a graph illustrating average oil absorption capacity ofvarious hydrophobic and hydrophilic cotton particles.

FIG. 6 is a graph illustrating average water absorption capacity ofvarious hydrophobic and hydrophilic cotton particles.

FIG. 7 is a graph illustrating average sebum measurements of variouscleanser formulations over time.

DETAILED DESCRIPTION OF THE INVENTION

As used herein, the term “hydrophobic” means materials having a surfacecontact angle with squalene of less than 40 degrees and/or a surfacecontact angle with water of greater than 90 degrees. The term “surfacecontact angle” means the internal angle between a surface and a liquiddroplet resting on that surface. Surface tension (liquid) or surfacefree energy (solid) is considered to be a resulting balance between themolecular interactions of the liquid-liquid and air-liquid orsolid-solid and air-solid phase at the interfacial layer. The term“contact angle” is a convenient and useful parameter to determine thesurface free energy and wettability of any given solid surface due tothe non-deformability of the solid. The contact angle is determined bymeasuring the angle formed between substrate surface where a liquiddroplet is placed and the tangent to the drop surface from the contactpoint. High contact angles correspond to poor wetting of the surface bythe liquid and low contact angles signify good wetting. If a liquidspreads on the surface, the contact angle is considered to be zero andcomplete wetting is said to occur.

Contact angle measurements can be employed to determine the wettabilityof human skin by a variety of liquids, including hydrophobic liquidssuch as squalene and hydrophilic liquids, including water. A smallercontact angle with a non-polar liquid (such as squalene) corresponds toa more hydrophobic material while a smaller water contact anglecorresponds to a more hydrophilic material.

In accordance with the methods and compositions of this invention, thewater contact angle of the hydrophobic, linear cellulose particles ispreferably greater than 90 degrees, preferably greater than 100 degreesand more preferably greater than 120 degrees.

As used herein, the term “oil absorption capacity and retention” refersto the weight percentage of the oil absorbed by the hydrophobic, linearcellulose particles useful in the compositions and methods of thisinvention. High oil absorption capacity and retention corresponds to anincreased hydrophobic property. The oil absorption capacity andretention of the hydrophobic, linear cellulose particles of thecompositions of this invention is preferably from about 150 to about500, and more preferably from about 300 to about 500 (% weightoil/weight particles).

As used herein, the term “particle” means a small localized object towhich can be ascribed physical properties such as volume or mass. Asused herein, the term “powder” is used synonymously to “particle”, asdefined herein.

As used herein, the term “linear particle” means a particle having onedimension (“length”) that is greater than another dimension (“width”).Linear particles may be measured and defined by size by subjecting suchparticles to analysis with respect to a series of sieves havingdifferent mesh sizes. Generally, a sample of linear particles may have adistribution of particle sizes throughout the sample. Thus, linearparticle sizes as expressed herein are expressed as an average particlesize and reflect the average length of the particles contained withinthe sample.

Preferably, the size of linear particles useful in the compositions andmethods of this invention is less than about 1000 μm in length, morepreferably, it ranges from about 1 to about 1000 μm, and most preferablyfrom about 10 to about 500 μm. The preferred width of linear particlesuseful in the compositions and methods of this invention are about 5 toabout 25 μm. More preferably, they are from about 5 to about 20 μm inwidth.

As used herein, the term “particle aspect ratio” means the ratio of thelength of a particle to its width. Preferably, the particle aspect ratioof the particles useful in the compositions and methods of thisinvention is from about 2 to about 1000. More preferably, the particleaspect ratio is from about 2 to about 500 and most preferably, fromabout 5 to about 200.

As used herein, the term “cellulose” refers to a polysaccharide materialconsisting of long unbranched chains of linked glucose units, having thechemical structure set forth in Formula I below:

Cellulose, the most abundant biomass on the surface of the earth, hasprovided mankind with functional, low cost and renewable raw material.

Cellulose materials useful in the compositions and methods of thisinvention may be derived from cotton, corn, wood pulp and bamboo pulp,silk, cork and the like. Preferably, the cellulose materials useful inthe compositions of this invention are derived from cotton. Morepreferably, the cellulosic particles are from fibers recovered frompost-industrial scrap. Such scrap is derived from waste or otherpre-consumer cotton products from, for example, the apparel, carpet,furniture and household goods industries. Synthetic or regeneratedcotton or cellulose materials may also be used as sources for thecellulose particles useful in the compositions and methods of thisinvention, including rayon, viscose, cellophane, and other cellulosicmaterials with a uniform and reproducible molecular size anddistribution.

The cellulose materials useful in the compositions and methods of thisinvention may be derived directly from the source plant (referred toherein as, “raw” particles) or may be generated from cloth or nonwovenmaterials previously formed from plant or cellulose fibers (referred toherein as “regenerated” particles). For example, cotton cloth may beprocessed so as to break the cloth into small particles and/or uniformfiber length by cutting the length of the cotton fibers from inches tomicrons. This random-cut fiber is available in several grades, white,dark, and unbleached, with average fiber lengths from about 1 micron toabout 1000 microns and preferably from about 2 microns to about 500microns.

It is believed that hydrophilic, raw cellulose particles having similarsize, aspect ratio and other characteristics to those of hydrophobiclinear particles useful in the present invention may also be useful inthe rinse-off and cleansing compositions of this invention.

Typical mechanical milling processes such as those useful in cuttingdown the size of the cellulose materials useful in the compositions andmethods of this invention, for example, are described in U.S. Pat. No.7,594,619 and U.S. Pat. No. 6,656,487, which are hereby incorporatedherein by reference.

Generally, the hydrophobic cellulose particles useful in thecompositions of this invention may be processed according to thefollowing methods.

One such method comprises mixing a cellulosic material derived frompost-industrial scrap, as defined above, with at least one of grindingaids selected from the group including water, fatty acids, syntheticpolymers and organic solvents, and, after mixing, mechanically grindingthe mixture.

Another method of obtaining hydrophobic cellulose particles is freezinga cellulosic material derived from post-industrial scrap at a lowtemperature, and then mechanically grinding said frozen material.

The cellulose particles useful in the compositions and methods of thisinvention may be further treated with hydrophobic agents to yieldhydrophobic cellulose particles. For example, a hydrophobic coatingagent may be used to treat the cellulose particles. The hydrophobiccoating agent may be any such agent known to one of skill in the art.Preferred hydrophobic coating agents react chemically with the celluloseparticle to provide a durable covalent bond thereto and have hydrophobicchemical backbones or substituents that can provide a hydrophobic outerlayer around each individual cellulosic particle. The coating agent mayreact, for example, with hydroxyl groups, available oxygen atoms presenton the surface of the cellulose particle being coated.

Hydrophobic agents may include, but are not limited to, low watersoluble organic compounds such as metal soap, e.g., a metal myristate,metal stearate, a metal palmitate, a metal laurate or other fatty acidderivatives known to one of skill in the art. Other hydrophobic agentsmay include an organic wax, such as a synthetic wax like polyethylene ora natural wax like carnauba wax. Hydrophobic agents useful in coatingthe cellulose particles useful in the compositions and methods of thisinvention may also be long chain fatty acids or esters such as stearicacid, oleic acid, castor oil, isododecane, silicone, and theirderivatives, non-water soluble polymers, e.g. high molecular weightmethylcellulose and ethylcellulose, and high molecular water insolublefluoropolymers etc., polymerized siloxanes or polysiloxanes with thechemical formula [R₂SiO]n, where R is an organic group such as methyl,ethyl, or phenyl, such as dimethicone, dimethicone copolyol, dimethiconeester; methicone and their derivatives. Examples of hydrophobic linearcotton particles useful in the present invention include, but are notlimited to, Cotton Fiber Flock CD60, available from Goonvean Fiber andW200 White Cotton Flock, available from International Fiber Corporation.

The hydrophobic cellulose particles of this invention may be formulatedinto a variety of “rinse-off” skin care applications.

The term “rinse-off” as used herein indicates that the compositions ofthe present invention are used in a context whereby the composition isultimately rinsed or washed from the treated surface, (e.g. skin or hardsurfaces) either after or during the application of the product. Theserinse-off compositions are to be distinguished from compositions whichare applied to the skin and allowed to remain on the skin subsequent toapplication.

The rinse-off, cellulose particle-containing compositions of thisinvention may be formulated into a wide variety of rinse-offcompositions for personal care, including but not limited to liquidcleansers, creamy cleansers, gel cleansers, soaps and makeup removers.

The topical cosmetic compositions of this invention may contain acarrier, which should be a cosmetically and/or pharmaceuticallyacceptable carrier. The carrier should be suitable for topicalapplication to the skin, should have good aesthetic properties andshould be compatible with other components in the composition.

These product types may comprise several types of cosmeticallyacceptable topical carriers including, but not limited to solutions,emulsions (e.g., microemulsions and nanoemulsions), gels, solids andliposomes. The following are non-limitative examples of such carriers.Other carriers can be formulated by those of ordinary skill in the art.

The rinse-off compositions of this invention preferably contain at leastone cleansing agent selected from the group consisting of fatty acidsoaps and synthetic surfactants and/or a mixture of such materials.Optionally, the compositions of this invention contain one or more skinconditioning agents. The compositions of this invention may also containone or more skin therapeutic agents. Preferably, the pH of thecompositions of this invention ranges from about 2 to about 11. Morepreferably, the pH ranges from about 3 to about 10.

The compositions of this invention may contain a saponified fat, forexample, fatty acid soaps containing from about 6 to about 22 carbonatoms, preferably form about 8 to about 18 carbon atoms, and morepreferably from about 12 to about 18 carbon atoms. Fatty acid soapshaving from about 8 to about 18 carbon atoms are preferably present inthe compositions of this invention in an amount of from about 1 to about60% by weight.

Preferably, the fatty acid soaps useful in the compositions of thisinvention are organic soaps obtained using organic neutralizersincluding, but not limited to, ammonium soap, trialkanolamine soap,aminomethyl propanol soap, aminomethyl propanedial soap and tromethaminesoap, more preferably triethanolamine soap and aminomethyl propanol soapand the like.

The synthetic surfactants useful in the compositions of this inventionare preferably synthetic surfactants selected from anionic, nonionic,amphoteric and zwitterionic surfactants. Preferably, they are present inthe compositions of this invention in amounts from about 1 to about 40%,more preferably from about 1 to about 30% and most preferably from about5 to about 30% by weight of the composition.

Amphoteric Synthetic Surfactants

Ampholytic synthetic detergents can be broadly described as derivativesof aliphatic amines which contain a long chain of about 8 to 18 carbonatoms and an anionic water-solubilizing group, e.g., carboxy, sulfo orsulfato. Examples of compounds falling within this definition are sodium3-dodecylaminopropionate, sodium-3-dodecylamino propane sulfonate, anddodecyl dimethylammonium hexanoate. Other examples of ampholytic andamphoteric surfactants are found in U.S. Pat. No. 3,318,817, issued toCunningham 15 on May 9, 1967, and hereby incorporated herein byreference.

The specific preferred examples of amphoteric surfactants are thosehaving the formula:

Zwitterionic Synthetic Surfactants

Zwitterionic surface active agents are broadly described as internallyneutralized derivatives of aliphatic quaternary ammonium, phosphoniumand tertiary sulfonium compounds, in which the aliphatic radical can bestraight chain or branched, and wherein one of the aliphaticsubstituents contains from about 8 to 18 carbon atoms and one containsan anionic water-solubilizing group, e.g., carboxy, sulfo, sulfato,phosphato, or phosphono. Some of these zwitterionic surfactants aredescribed in the following U.S. Pat. Nos. 2,129,264; 2,178,353;2,774,786; 2,813,898; and 2,828,332.

The specific preferred examples of zwitterionic surfactants are thosehaving the formula:

The water-soluble betaine surfactants are another example of azwitterionic surfactant useful herein. These materials have the generalformula:

Examples of suitable betaine compounds of this type includedodecyldimethylammonium acetate, tetradecyldimethylammonium acetate,hexadecyldimethylammonium acetate, alkyldimethylammonium acetate whereinthe alkyl group averages about 12 to 18 carbon atoms in length,dodecyldimethylammonium butanoate, tetradecyldimethylammonium butanoate,hexadecyldimethylammonium butanoate, dodecyldimethylammonium hexanoate,hexadecyldimethylammonium hexanoate, tetradecyldimethylammoniumpentanoate and tetradecyldipropyl ammonium pentanoate. Especiallypreferred betaine surfactants include dodecyldimethylammonium acetate,dodecyldimethylammonium hexanoate, hexadecyldimethylammonium acetate,and hexadecyldimethylammonium hexanoate.

Polymeric Material

As used herein the term “low molecular weight” polymer refers to apolymer having a number average molecular weight (M_(n)) of about100,000 or less as measured by gel permeation chromatography (GPC)calibrated with a poly(methyl methacrylate) (PMMA) standard. In certainpreferred embodiments, low-molecular weight polymers are those havingmolecular weight ranges of from about 5,000 to about 80,000 M_(n), morepreferably from about 10,000 to about 50,000 M_(n), and more preferablybetween about 15,000 and 40,000 M_(n).

The polymeric material useful in the composition of this invention ispreferably a polymeric material suitable for associating anionic and/oramphoteric surfactant thereto and is preferably a non-crosslinked,linear acrylic copolymer that mitigates the impaired dermal barrierdamage typically associated with surfactant systems withoutsubstantially increasing viscosity build. The non-crosslinked, linearpolymers are preferably of low molecular weight having a number averagemolecular weight of 100,000 or less as measured by gel permeationchromatography (GPC) calibrated with a poly(methyl methacrylate) (PMMA)standard (as used herein, unless otherwise specified, all number averagemolecular weights (M_(n)) refer to molecular weight measured in suchmanner). Thus, the polymeric material functions as a copolymericmitigant. The copolymeric mitigant is polymerized from at least twomonomeric components. The first monomeric component is selected from oneor more α,β-ethylenically unsaturated monomers containing at least onecarboxylic acid group. This acid group can be derived from monoacids ordiacids, anhydrides of dicarboxylic acids, monoesters of diacids, andsalts thereof. The second monomeric component is hydrophobicallymodified (relative to the first monomeric component) and is selectedfrom one or more α,β-ethylenically unsaturated non-acid monomerscontaining a C₁ to C₉ alkyl group, including linear and branched C₁ toC₉ alkyl esters of (meth)acrylic acid, vinyl esters of linear andbranched C₁ to C₁₀ carboxylic acids, and mixtures thereof. In one aspectof the invention the second monomeric component is represented by theformula:

CH₂═CRX

wherein R is hydrogen or methyl; X is —C(O)OR¹ or —OC(O)R²; R¹ is linearor branched C₁ to C₉ alkyl; and R² is hydrogen or linear or branched C₁to C₉ alkyl. In another aspect of the invention R¹ and R² is linear orbranched C₁ to C₈ alkyl and in a further aspect R¹ and R² are linear orbranched C₂ to C₅ alkyl.

Exemplary first monomeric components include (meth)acrylic acid,itaconic acid, citraconic acid, maleic acid, fumaric acid, crotonicacid, aconitic acid, and mixtures thereof. Exemplary second monomericcomponents include ethyl (meth)acrylate, butyl (meth)acrylate,2-ethylhexyl (meth)acrylate, vinyl formate, vinyl acetate, 1-methylvinylacetate, vinyl propionate, vinyl butyrate, vinyl 2-ethylhexanoate, vinylpivalate, vinyl neodecanoate, and mixtures thereof. As used herein, theterm “(meth)acrylic” acid and “(meth)acrylate” are meant to include thecorresponding methyl derivatives of acrylic acid and the correspondingalkyl acrylate. For example, “(meth)acrylic” acid refers to acrylic acidand/or methacrylic acid and “(meth)acrylate” refers to alkyl acrylateand/or alkyl methacrylate.

More preferably, said first monomeric component is selected from thegroup consisting of (meth)acrylic acid and said second monomericcomponent is selected from the group consisting of at least one C₁ to C₉alkyl (meth)acrylate.

The non-crosslinked, linear acrylic copolymer mitigants of the inventioncan be synthesized via free radical polymerization techniques known inthe art. In one aspect of the invention, the amount of the firstmonomeric component to the second monomeric component utilized rangesfrom about 20:80% to about 50:50% by weight, based on the total weightof all of the monomers in the polymerization medium. In another aspectthe weight ratio of the first monomeric component to the secondmonomeric component is about 35:65% by weight, and in a further aspectthe weight ratio of first monomeric component to second monomericcomponent is about 25:75% by weight, all based on the total weight ofall monomers in the polymerization medium.

In another aspect emulsion polymerization techniques can be used tosynthesize the non-crosslinked, linear acrylic copolymer mitigants thatmay be useful in the invention. In a typical emulsion polymerization, amixture of the disclosed monomers is added with mixing agitation to asolution of emulsifying surfactant, such as, for example, an anionicsurfactant (e.g., fatty alcohol sulfates or alkyl sulfonates), in asuitable amount of water, in a suitable reactor, to prepare a monomeremulsion. The emulsion is deoxygenated by any convenient method, such asby sparging with nitrogen, and then a polymerization reaction isinitiated by adding a polymerization catalyst (initiator) such as sodiumpersulfate, or any other suitable addition polymerization catalyst, asis well known in the emulsion polymerization art. The polymerizationmedium is agitated until the polymerization is complete, typically for atime in the range of about 4 to about 16 hours. The monomer emulsion canbe heated to a temperature in the range of about 70 to about 95° C.prior to addition of the initiator, if desired. Unreacted monomer can beeliminated by addition of more catalyst, as is well known in theemulsion polymerization art. The resulting polymer emulsion product canthen be discharged from the reactor and packaged for storage or use.Optionally, the pH or other physical and chemical characteristics of theemulsion can be adjusted prior to discharge from the reactor. Typically,the product emulsion has a total solids content in the range of about 10to about 50% by weight. Typically, the total polymer content (polymersolids) of the product emulsion is in the range of about 15 to about 45%by weight, generally not more than about 35% by weight.

In one aspect, the number average molecular weight (M_(n)) of the linearcopolymeric mitigants that may be useful in the invention as measured bygel permeation chromatography (GPC) calibrated with a poly(methylmethacrylate) (PMMA) standard is 100,000 or less. In another aspect ofthe invention, the molecular weight ranges between about 5,000 and about80,000 M_(n), in a further aspect between about 10,000 and 50,000 M_(n),and in a still further aspect between about 15,000 and 40,000 M_(n).

In one aspect of the invention, the linear copolymeric mitigants have aviscosity of 500 mPa·s or less (Brookfield RVT, 20 rpm, spindle no. 1)at a 5% by weight polymer solids concentration in deionized water andneutralized to pH 7 with an 18% by weight NaOH solution. The viscositycan range from about 1 to about 500 mPa·s in another aspect, from about10 to about 250 mPa·s in a further aspect, and from about 15 to about150 mPa·s in a still further aspect.

Preferably, the low molecular weight, non-crosslinked linear acryliccopolymer is potassium acrylates copolymer.

Any of a variety of non-ethoxylated anionic surfactants may be combinedwith a polymeric material of this invention to form a cleansingcomposition according to preferred embodiments of the present invention.Non-ethoxylated anionic surfactants are surfactants that have a negativecharge and do not contain any ethoxylated segments, that is to say thereare no —(C—C—O)_(v) segments on the surfactants. According to certainembodiments, suitable non-ethoxylated anionic surfactants include thoseselected from the following classes of surfactants: alkyl sulfates,alkyl sulfonates, alkyl monoglyceride sulfonates, alkylaryl sulfonates,alkyl sulfosuccinates, alkyl sulfosuccinamates, alkyl carboxylates,fatty alkyl sulfoacetates, alkyl phosphates, acylglutamates,sarcosinates, taurates, and mixtures of two or more thereof. Examples ofcertain preferred anionic surfactants include:

alkyl sulfates of the formula

R′—CH₂OSO₃X′;

alkyl monoglyceride sulfates of the formula

alkyl monoglyceride sulfonates of the formula

alkyl sulfonates of the formula

R′—SO₃X′;

alkylaryl sulfonates of the formula

alkyl sulfosuccinates of the formula:

alkyl phosphates

wherein

-   -   R′ is an alkyl group having from about 7 to about 22, and        preferably from about 7 to about 16 carbon atoms,    -   R′₁ is an alkyl group having from about 1 to about 18, and        preferably from about 8 to about 14 carbon atoms,    -   R′₂ is a substituent of a natural or synthetic I-amino acid,    -   X′ is selected from the group consisting of alkali metal ions,        alkaline earth metal ions, ammonium ions, and ammonium ions        substituted with from about 1 to about 3 substituents, each of        the substituents may be the same or different and are selected        from the group consisting of alkyl groups having from 1 to 4        carbon atoms and hydroxyalkyl groups having from about 2 to        about 4 carbon atoms and        -   w is an integer from 0 to 20;            and mixtures thereof.

According to certain embodiments set forth in patent applications U.S.Ser. Nos. 12/822,329 and 12/976,573, the anionic surfactant of thisinvention is preferably a non-ethoxylated SO_(x) anionic surfactantconforming to the structure below

where SO₃ ⁻ is the anionic hydrophilic group, M⁺ is a monovalent cation(such as NH₄ ⁺, Na⁺, K⁺, (HOCH₂CH₂)₃N⁺, etc.), and R comprises any of abroad range of hydrophobic groups and optionally, a) functional groupsto link the hydrophilic and hydrophobic moieties and/or b) additionalhydrophilic groups. Examples include:

Alkyl sulfonates, where R equals C₆-C₂₀ alkyl, (linear or branched,saturated or unsaturated), preferably C₁₀-C₁₈, and most preferablyC₁₂-C₁₇. Specific examples include Sodium C₁₃-C₁₇ Alkane Sulfonate(R═C₁₃-C₁₇ alkyl, M⁺═Na⁺) and Sodium C₁₄-C₁₇ Alkyl Sec Sulfonate(R=s-C₁₃-C₁₇ alkyl, M⁺═Na⁺)

Alpha olefin sulfonates, where R equals a mixture of

and

R₁—CH₂—CH═CH—CH₂—

where R₁═C₄-C₁₆ alkyl or mixtures thereof, preferably C₆-C₁₂, morepreferably C₈-C₁₂, and most preferably C₁₀-C₁₂. Specific examplesinclude Sodium C₁₂₋₁₄ Olefin Sulfonate (R₁═C₈-C₁₀ alkyl, M⁺═Na⁺) andSodium C₁₄₋₁₆ Olefin Sulfonate (R₁═C₁₀-C₁₂ alkyl, M⁺═Na⁺).

Alkyl sulfate esters, where R₁═C₆-C₂₀,

R₁—O—

(linear or branched, saturated or unsaturated), preferably C₁₂-C₁₈, morepreferably C₁₂-C₁₆, and most preferably C₁₂-C₁₄. Specific examplesinclude Ammonium Lauryl Sulfate (R₁=lauryl, C₁₂H₂₅, M⁺═NH₄ ⁺), SodiumLauryl Sulfate (R₁=lauryl, C₁₂H₂₅, M⁺═Na⁺), and Sodium Cocosulfate(R₁=coco alkyl, M⁺═Na⁺).

As used herein, the term “amphoteric” means: 1) molecules that containboth acidic and basic sites such as, for example, an amino acidcontaining both amino (basic) and acid (e.g., carboxylic acid, acidic)functional groups; or 2) zwitterionic molecules which possess bothpositive and negative charges within the same molecule. The charges ofthe latter may be either dependent on or independent of the pH of thecomposition. Examples of zwitterionic materials include, but are notlimited to, alkyl betaines and amidoalkyl betaines as set forth aboveand below. The amphoteric surfactants are disclosed herein without acounter ion. One skilled in the art would readily recognize that underthe pH conditions of the compositions of this invention, the amphotericsurfactants are either electrically neutral by virtue of havingbalancing positive and negative charges, or they have counter ions suchas alkali metal, alkaline earth, or ammonium counter ions.

Examples of amphoteric surfactants suitable for use in this inventioninclude, but are not limited to, amphocarboxylates such asalkylamphoacetates (mono or di); alkyl betaines; amidoalkyl betaines;alkyl sultaines; amidoalkyl sultaines; amphophosphates; phosphorylatedimidazolines such as phosphobetaines and pyrophosphobetaines;carboxyalkyl alkyl polyamines; alkylimino-dipropionates;alkylamphoglycinates (mono or di); alkylamphoproprionates (mono ordi),); N-alkyl β-aminoproprionic acids; alkylpolyamino carboxylates; andmixtures thereof.

Examples of suitable amphocarboxylate compounds include those of theformula:

A-CONH(CH₂)_(x)N⁺R₅R₆R₇

-   -   wherein    -   A is an alkyl or alkenyl group having from about 7 to about 21,        e.g. from about 10 to about 16 carbon atoms;    -   x is an integer of from about 2 to about 6;        R₅ is hydrogen or a carboxyalkyl group containing from about 2        to about 3 carbon atoms;    -   R₆ is a hydroxyalkyl group containing from about 2 to about 3        carbon atoms or is a group of the formula:

R₈—O—(CH₂)_(n)CO₂

-   -   wherein    -   R₈ is an alkylene group having from about 2 to about 3 carbon        atoms and n is 1 or 2; and    -   R₇ is a carboxyalkyl group containing from about 2 to about 3        carbon atoms;

Examples of suitable alkyl betaines include those compounds of theformula:

B—N⁺R₉R₁₀(CH₂)_(p)CO₂ ⁻

-   -   wherein        -   B is an alkyl or alkenyl group having from about 8 to about            22, e.g., from about 8 to about 16 carbon atoms;        -   R₉ and R₁₀ are each independently an alkyl or hydroxyalkyl            group having from about 1 to about 4 carbon atoms; and        -   p is 1 or 2.

A preferred betaine for use in this invention is lauryl betaine,available commercially from Albright & Wilson, Ltd. of West Midlands,United Kingdom as “Empigen BB/J.”

Examples of suitable amidoalkyl betaines include those compounds of theformula:

D-CO—NH(CH₂)_(q)—N⁺R₁₁R₁₂(CH₂)_(m)CO₂ ⁻

-   -   wherein    -   D is an alkyl or alkenyl group having from about 7 to about 21,        e.g. from about 7 to about 15 carbon atoms;        -   R₁₁ and R₁₂ are each independently an alkyl or        -   Hydroxyalkyl group having from about 1 to about 4 carbon            atoms;        -   q is an integer from about 2 to about 6; and m is 1 or 2.

One amidoalkyl betaine is cocamidopropyl betaine, available commerciallyfrom Goldschmidt Chemical Corporation of Hopewell, Va. under thetradename, “Tegobetaine L7.”

Examples of suitable amidoalkyl sultaines include those compounds of theformula

wherein

-   -   E is an alkyl or alkenyl group having from about 7 to about 21,        e.g. from about 7 to about 15 carbon atoms;    -   R₁₄ and R₁₅ are each independently an alkyl, or hydroxyalkyl        group having from about 1 to about 4 carbon atoms;    -   r is an integer from about 2 to about 6; and    -   R₁₃ is an alkylene or hydroxyalkylene group having from about 2        to about 3 carbon atoms;

In one embodiment, the amidoalkyl sultaine is cocamidopropylhydroxysultaine, available commercially from Rhone-Poulenc Inc. ofCranbury, N.J. under the tradename, “Mirataine CBS.”

Examples of suitable amphophosphate compounds include those of theformula:

-   -   wherein        -   G is an alkyl or alkenyl group having about 7 to about 21,            e.g. from about 7 to about 15 carbon atoms;    -   s is an integer from about 2 to about 6;    -   R₁₆ is hydrogen or a carboxyalkyl group containing from about 2        to about 3 carbon atoms;    -   R₁₇ is a hydroxyalkyl group containing from about 2 to about 3        carbon atoms or a group of the formula:

R₁₉—O—(CH₂)_(t)—CO₂ ⁻

-   -   wherein R₁₉ is an alkylene or hydroxyalkylene group having from        about 2 to about 3 carbon atoms and t is 1 or 2; and        R₁₈ is an alkylene or hydroxyalkylene group having from about 2        to about 3 carbon atoms.

In one embodiment, the amphophosphate compounds are sodium lauroamphoPG-acetate phosphate, available commercially from Mona Industries ofPaterson, N.J. under the tradename, “Monateric 1023,” and thosedisclosed in U.S. Pat. No. 4,380,637, which is incorporated herein byreference.

Examples of suitable phosphobetaines include those compounds of theformula:

wherein E, r, R₁, R₂ and R₃, are as defined above. In one embodiment,the phosphobetaine compounds are those disclosed in U.S. Pat. Nos.4,215,064, 4,617,414, and 4,233,192, which are all incorporated hereinby reference.

Examples of suitable pyrophosphobetaines include those compounds of theformula:

wherein E, r, R₁, R₂ and R₃, are as defined above. In one embodiment,the pyrophosphobetaine compounds are those disclosed in U.S. Pat. Nos.4,382,036, 4,372,869, and 4,617,414, which are all incorporated hereinby reference.

Examples of suitable carboxyalkyl alkylpolyamines include those of theformula:

wherein

I is an alkyl or alkenyl group containing from about 8 to about 22, e.g.from about 8 to about 16 carbon atoms;

R₂₂ is a carboxyalkyl group having from about 2 to about 3 carbon atoms;

R₂₁ is an alkylene group having from about 2 to about 3 carbon atoms and

-   -   u is an integer from about 1 to about 4.

Any suitable amounts of polymeric material and surfactants may be usedin accord with the compositions and methods of this invention. Incertain preferred embodiments, the compositions of this invention maycomprise from greater than zero to about 6 weight percent of polymericmaterial (based on active amount of polymeric material in the totalweight of composition). In certain more preferred embodiments, thecompositions comprise from about 0.1 to about 4.5 weight percent ofpolymeric material, more preferably from about 0.1 to about 3.5 weightpercent of polymeric material, and even more preferably from about 0.2to about 2.5 weight percent of polymeric material. In the case ofcleansing compositions containing amphoteric blends that aresubstantially free of anionic surfactants, where the composition doesnot contain cocobetaine, the polymeric material should be present in anamount between about 0.03 and about 2.1 weight percent of thecomposition. Where cocobetaine is present as a surfactant, there shouldbe less than about 0.03 weight percent or more than about 1.6 weightpercent of polymeric material in the composition.

In certain preferred embodiments, the compositions of this inventioncomprise from about 0.0015 to about 15 weight percent of surfactantsbased on total active amount of surfactant(s) in the total weight ofcomposition. In certain more preferred embodiments, the compositionscomprise from about 2 to about 12 weight percent of total surfactants.Preferred embodiment formulas have from about 2 to about 9 weightpercent total surfactants. Preferred embodiments have from about 2 toabout 7 weight percent total surfactants. In cases in which cocobetaineis present, said cocobetaine should be present in an amount less thanabout 0.065 weight percent or greater than about 3.5 weight percent inthe composition.

When formulating the compositions of the present invention, when theratio of non-ethoxylated anionic surfactant to amphoteric surfactant isless than 0.5, the pH of the composition should be between 4.8 and about6. When the ratio of non-ethoxylated anionic surfactant to amphotericsurfactant is greater than 0.5, the pH of the composition can be lessthan or equal to 6, preferably between 2.5 and 6.

The non-crosslinked, linear acrylic copolymers useful in thecompositions of this invention can be synthesized via free radicalpolymerization techniques known in the art. In one aspect of theinvention, the amount of the first monomeric component to the secondmonomeric component utilized ranges from about 20:80 wt. % to about50:50 wt. %, based on the total weight of all of the monomers in thepolymerization medium. In another aspect the weight ratio of the firstmonomeric component to the second monomeric component is about 35:65 wt.%, and in a further aspect the weight ratio of first monomeric componentto second monomeric component is about 25:75 wt. %, all based on thetotal weight of all monomers in the polymerization medium.

The cleansing compositions produced, as well as any of the compositionscontaining polymeric material and a surfactant component having at leastone non-ethoxylated anionic surfactant and at least one amphotericsurfactant that are combined in the combining step according to themethods of this invention may further contain any of a variety of othercomponents nonexclusively including additives which enhance theappearance, feel and fragrance of the compositions, such as colorants,fragrances, preservatives, pH adjusting agents and the like.

Any of a variety of nonionic surfactants are suitable for use in thecompositions of this invention, keeping in mind that total surfactantload should not exceed about 14 weight percent of the compositions setforth herein. Examples of suitable nonionic surfactants include, but arenot limited to, fatty alcohol acid or amide ethoxylates, monoglycerideethoxylates, sorbitan ester ethoxylates, alkyl polyglucosides,polyglyceryl esters, mixtures thereof, and the like. Certain preferrednonionic surfactants include alkyl polyglucosides, such as but notlimited to coco-glucoside and decyl-glucoside, and polyglyceryl esters,such as but not limited to polyglyceryl-10 laurate and polyglyceryl-10oleate.

Any of a variety of commercially available secondary conditioners, suchas volatile silicones, which impart additional attributes, such as glossto the hair are suitable for use in this invention. In one embodiment,the volatile silicone conditioning agent has an atmospheric pressureboiling point less than about 220° C. The volatile silicone conditionermay be present in an amount of from about 0 percent to about 3 percent,e.g. from about 0.25 percent to about 2.5 percent or from about 0.5percent to about 1 percent, based on the overall weight of thecomposition. Examples of suitable volatile silicones nonexclusivelyinclude polydimethylsiloxane, polydimethylcyclosiloxane,hexamethyldisiloxane, cyclomethicone fluids such aspolydimethylcyclosiloxane available commercially from Dow CorningCorporation of Midland, Mich. under the tradename, “DC-345” and mixturesthereof, and preferably include cyclomethicone fluids.

Any of a variety of commercially available humectants, which are capableof providing moisturization and conditioning properties to the personalcleansing composition, are suitable for use in this invention. Thehumectant may be present in an amount of from about 0 percent to about10 percent, e.g. from about 0.5 percent to about 5 percent or from about0.5 percent to about 3 percent, based on the overall weight of thecomposition. Examples of suitable humectants nonexclusively include: 1)water soluble liquid polyols selected from the group comprisingglycerine, propylene glycol, hexylene glycol, butylene glycol,dipropylene glycol, and mixtures thereof; 2)polyalkylene glycol of theformula: HO—(R″O)_(b)—H, wherein R″ is an alkylene group having fromabout 2 to about 3 carbon atoms and b is an integer of from about 2 toabout 10; 3) polyethylene glycol ether of methyl glucose of formulaCH₃—C₆H₁₀O₅—(OCH₂CH₂)_(c)—OH, wherein c is an integer from about 5 toabout 25; 4) urea; and 5) mixtures thereof, with glycerine being thepreferred humectant.

Examples of suitable chelating agents include those which are capable ofprotecting and preserving the compositions of this invention.Preferably, the chelating agent is ethylenediamine tetracetic acid(“EDTA”), and more preferably is tetrasodium EDTA, availablecommercially from Dow Chemical Company of Midland, Mich. under thetradename, “Versene 100XL” and is present in an amount, based upon thetotal weight of the composition, from about 0 to about 0.5 percent orfrom about 0.05 percent to about 0.25 percent.

Suitable preservatives include organic acid preservatives may includebenzoic acid and alkali metal and ammonium salts thereof (e.g. sodiumbenzoate), sorbic acid and alkali metal and ammonium salts thereof (e.g.potassium sorbate), p-Anisic acid and alkali metal and ammonium saltsthereof, and salicylic acid and alkali metal and ammonium salts thereof.

The pH of the composition may be adjusted to the appropriate acidicvalue using any cosmetically acceptable organic or inorganic acid, suchas citric acid, acetic acid, glycolic acid, lactic acid, malic acid,tartaric acid, or hydrochloric acid.

In one embodiment of the composition, sodium benzoate is present in thecomposition in an amount, based upon the total weight of thecomposition, from about 0 to about 0.5 percent. In another embodiment,potassium sorbate is present in the composition in an amount, based uponthe total weight of the composition, from about 0 to about 0.6 percent,more preferably from about 0.3 to about 0.5 percent.

The methods of this invention may further comprise any of a variety ofsteps for mixing or introducing one or more of the optional componentsdescribed hereinabove with or into a composition comprising a polymericmaterial before, after, or simultaneously with the combining stepdescribed above. While in certain embodiments, the order of mixing isnot critical, it is preferable, in other embodiments, to pre-blendcertain components, such as the fragrance and the nonionic surfactantbefore adding such components into a composition comprising a polymericmaterial and/or an anionic surfactant.

The cleansing methods of this invention may further include any of avariety of additional, optional steps associated conventionally withcleansing hair and skin including, for example, lathering, rinsingsteps, and the like.

The foregoing information regarding low molecular weighthydrophobically-modified polymers as well as compositions that may beuseful in the methods of this invention are set forth in U.S. Pat. No.7,803,403, US2006/0257348, and US20070111910, all of which are herebyincorporated herein by reference.

The methods and compositions of this invention illustratively disclosedherein suitably may be practiced in the absence of any component,ingredient, or step which is not specifically disclosed herein. Severalexamples are set forth below to further illustrate the nature of theinvention and the manner of carrying it out. However, the inventionshould not be considered as being limited to the details thereof.

The topical rinse-off compositions useful in the compositions of thisinvention may be formulated as solutions. Solutions typically include anaqueous solvent (e.g., from about 50% to about 99.99% or from about 90%to about 99% of a cosmetically acceptable aqueous solvent).

Topical compositions useful in the subject invention may be formulatedas a solution comprising an emollient. Such compositions preferablycontain from about 2% to about 50% of an emollient(s). As used herein,“emollients” refer to materials used for the prevention or relief ofdryness, as well as for the protection of the skin. A wide variety ofsuitable emollients is known and may be used herein. Sagarin, Cosmetics,Science and Technology, 2nd Edition, Vol. 1, pp. 32-43 (1972) and theInternational Cosmetic Ingredient Dictionary and Handbook, eds.Wenninger and McEwen, pp. 1656-61, 1626, and 1654-55 (The Cosmetic,Toiletry, and Fragrance Assoc., Washington, D.C., 7^(th) Edition, 1997)(hereinafter “ICI Handbook”) contains numerous examples of suitablematerials.

Preferably, the rinse-off compositions of this invention contain fromabout 1% to about 20% (e.g., from about 5% to about 10%) of anemollient(s) and from about 50% to about 90% (e.g., from about 60% toabout 80%) of water.

Topical compositions useful in the subject invention may be formulatedas a solution containing an emulsifier. Such compositions preferablycontain from about 0.1% to about 1% of an emulsifier. Emulsifiers may benonionic, anionic or cationic. Suitable emulsifiers are disclosed in,for example, U.S. Pat. No. 3,755,560, U.S. Pat. No. 4,421,769,McCutcheon's Detergents and Emulsifiers, North American Edition, pp.317-324 (1986), and the ICI Handbook, pp. 1673-1686.

Another type of product that may be formulated from a solution is acreamy cleanser. A creamy cleanser preferably contains from about 5% toabout 50% (e.g., from about 10% to about 20%) of an emollient(s) andfrom about 45% to about 85% (e.g., from about 50% to about 75%) ofwater.

The topical compositions useful in this invention formulated asemulsions. If the carrier is an emulsion, from about 1% to about 10%(e.g., from about 2% to about 5%) of the carrier comprises anemulsifier(s). Emulsifiers may be nonionic, anionic or cationic.Suitable emulsifiers are disclosed in, for example, U.S. Pat. No.3,755,560, U.S. Pat. No. 4,421,769, McCutcheon's Detergents andEmulsifiers, North American Edition, pp. 317-324 (1986), and the ICIHandbook, pp. 1673-1686.

The topical rinse-off compositions of this invention may also beformulated as emulsions. Typically such lotions comprise from 0.5% toabout 5% of an emulsifier(s). Such creams would typically comprise fromabout 1% to about 20% (e.g., from about 5% to about 10%) of anemollient(s); from about 20% to about 80% (e.g., from 30% to about 70%)of water; and from about 1% to about 10% (e.g., from about 2% to about5%) of an emulsifier(s).

Single emulsion skin care preparations, such as lotions and creams, ofthe oil-in-water type and water-in-oil type are well-known in thecosmetic art and are useful in the subject invention. Multiphaseemulsion compositions, such as the water-in-oil-in-water type, asdisclosed in U.S. Pat. Nos. 4,254,105 and 4,960,764, are also useful inthe subject invention. In general, such single or multiphase emulsionscontain water, emollients, and emulsifiers as essential ingredients.

The topical compositions of this invention can also be formulated as agel (e.g., an aqueous gel using a suitable gelling agent(s)). Suitablegelling agents for aqueous gels include, but are not limited to, naturalgums, acrylic acid and acrylate polymers and copolymers, and cellulosederivatives (e.g., hydroxymethyl cellulose and hydroxypropyl cellulose).Suitable gelling agents for oils (such as mineral oil) include, but arenot limited to, hydrogenated butylene/ethylene/styrene copolymer andhydrogenated ethylene/propylene/styrene copolymer. Such gels typicallycomprises between about 0.1% and 5%, by weight, of such gelling agents.

The topical rinse-off compositions of this invention may also beformulated as suspensions. In such a case, the compositions of thisinvention preferably contain a suspending agent. As used herein, theterm “suspending agent” means any material known or otherwise effectivein providing suspending, gelling, viscosifying, solidifying and/orthickening properties to the composition or which otherwise providestructure to the final product form. These suspending agents includegelling agents, and polymeric or nonpolymeric or inorganic thickening orviscosifying agents. Such materials will typically be solids underambient conditions and include organic solids, silicone solids,crystalline or other gellants, inorganic particulates such as clays orsilicas, or combinations thereof.

The concentration and type of suspending agent selected for use in thetopical leave-on compositions of this invention will vary depending uponthe desired product hardness, rheology, and/or other related productcharacteristics. For most suspending agents suitable for use herein,total concentrations range from about 0.1% to about 40%, more typicallyfrom about 0.1% to about 35%, by weight of the composition. Suspendingagent concentrations will tend to be lower for liquid embodiments (e.g.,pressurized or other liquid sprays, roll-ons, etc) and higher forsemi-solid (e.g., soft solids or creams) or solid cleanser embodiments.Preferably, the suspending agents are present in the compositions ofthis invention in an amount from about 0.1% to about 40%, morepreferably, the suspending agents are present in an amount from about0.1% to about 30.

Non limiting examples of suitable suspending agents include hydrogenatedcastor oil (e.g., Castor wax MP80, Castor Wax, etc.), fatty alcohols(e.g., stearyl alcohol), solid paraffins, triglycerides and othersimilar solid suspending esters or other microcrystalline waxes,silicone and modified silicone waxes. Non limiting examples of optionalsuspending agents suitable for use herein are described in U.S. Pat. No.5,976,514 (Guskey et al.), U.S. Pat. No. 5,891,424 (Bretzler et al.),which descriptions are incorporated herein by reference.

Other suitable suspending agents include silicone elastomers atconcentrations ranging from about 0.1% to about 10%, by weight of thecomposition. Non-limiting examples of such silicone elastomer materialssuitable for use as a suspending agent herein are described in U.S. Pat.No. 5,654,362 (Schulz, Jr. et al.); U.S. Pat. No. 6,060,546 (Powell etal.) and U.S. Pat. No. 5,919,437 (Lee et al.), which descriptions areincorporated herein by reference. These silicone elastomers materialscan also be added for their skin feel or other cosmetic benefits alone,or for such benefits in combination with suspending agent benefits.

The topical compositions of this invention can also be formulated into asolid formulation (e.g., a wax-based stick, soap bar composition,powder, or a wipe containing powder).

The topical compositions useful in the subject invention may contain, inaddition to the aforementioned components, a wide variety of additionaloil-soluble materials and/or water-soluble materials conventionally usedin compositions for use on skin, hair, and nails at theirart-established levels.

Additional Cosmetically Active Agents

In one embodiment, the topical composition further comprises anothercosmetically active agent in addition to the cellulose particles. Whatis meant by a “cosmetically active agent” is a compound that has acosmetic or therapeutic effect on the skin, hair, or nails, e.g.,lightening agents, darkening agents such as self-tanning agents,anti-acne agents, shine control agents, anti-microbial agents,anti-inflammatory agents, anti-mycotic agents, anti-parasite agents,external analgesics, sunscreens, photoprotectors, antioxidants,keratolytic agents, detergents/surfactants, moisturizers, nutrients,vitamins, energy enhancers, anti-perspiration agents, astringents,deodorants, hair removers, firming agents, anti-callous agents, andagents for hair, nail, and/or skin conditioning.

In one embodiment, the agent is selected from, but not limited to, thegroup consisting of hydroxy acids, benzoyl peroxide, sulfur resorcinol,ascorbic acid, D-panthenol, hydroquinone, octyl methoxycinnimate,titanium dioxide, octyl salicylate, homosalate, avobenzone,polyphenolics, carotenoids, free radical scavengers, spin traps,retinoids such as retinol and retinyl palmitate, ceramides,polyunsaturated fatty acids, essential fatty acids, enzymes, enzymeinhibitors, minerals, hormones such as estrogens, steroids such ashydrocortisone, 2-dimethylaminoethanol, copper salts such as copperchloride, peptides containing copper such as Cu:Gly-His-Lys, coenzymeQ10, peptides such as those disclosed in U.S. Pat. No. 6,620,419, lipoicacid, amino acids such a proline and tyrosine, vitamins, lactobionicacid, acetyl-coenzyme A, niacin, riboflavin, thiamin, ribose, electrontransporters such as NADH and FADH2, and other botanical extracts suchas aloe vera, and derivatives and mixtures thereof. The cosmeticallyactive agent will typically be present in the composition of theinvention in an amount of from about 0.001% to about 20% by weight ofthe composition, e.g., about 0.01% to about 10% such as about 0.1% toabout 5%.

Examples of vitamins include, but are not limited to, vitamin A, vitaminBs such as vitamin B3, vitamin B5, and vitamin B12, vitamin C, vitaminK, and vitamin E and derivatives thereof.

Examples of hydroxy acids include, but are not limited, to glycolicacid, lactic acid, malic acid, salicylic acid, citric acid, and tartaricacid and the like.

Examples of antioxidants include, but are not limited to, water-solubleantioxidants such as sulfhydryl compounds and their derivatives (e.g.,sodium metabisulfite and N-acetyl-cysteine), lipoic acid anddihydrolipoic acid, resveratrol, lactoferrin, and ascorbic acid andascorbic acid derivatives (e.g., ascorbyl palmitate and ascorbylpolypeptide). Oil-soluble antioxidants suitable for use in thecompositions of this invention include, but are not limited to,butylated hydroxytoluene, retinoids (e.g., retinol and retinylpalmitate), tocopherols (e.g., tocopherol acetate), tocotrienols, andubiquinone. Natural extracts containing antioxidants suitable for use inthe compositions of this invention, include, but not limited to,extracts containing flavonoids and isoflavonoids and their derivatives(e.g., genistein and diadzein), extracts containing resveratrol and thelike. Examples of such natural extracts include grape seed, green tea,pine bark, and propolis. Other examples of antioxidants may be found onpages 1612-13 of the ICI Handbook.

Other Materials

Various other materials may also be present in the compositions usefulin the subject invention. These include humectants, proteins andpolypeptides, preservatives and an alkaline agent. Examples of suchagents are disclosed in the ICI Handbook, pp. 1650-1667.

The compositions of this invention may also comprise chelating agents(e.g., EDTA) and preservatives (e.g., parabens). Examples of suitablepreservatives and chelating agents are listed in pp. 1626 and 1654-55 ofthe ICI Handbook. In addition, the topical compositions useful hereincan contain conventional cosmetic adjuvants, such as dyes, opacifiers(e.g., titanium dioxide), pigments, and fragrances.

It was found that the hydrophobic cellulose particles useful in thecompositions of this invention have excellent water and oil absorptionproperties. It is believed that the compositions of this inventioncontain hydrophobic cellulose particles may absorb excess sebum from theskin, thus reducing skin shininess. The compositions of this inventionalso are believed to protect the skin barrier by forming a hydrophobiclayer on the surface of the skin and preventing the penetration ofsurfactants, emulsifiers or other potentially irritating ingredients. Inaddition, such a hydrophobic layer formed on the surface of the skinshould reduce trans-epithelial water loss and increase hydration of theskin. However, in some instances, it may be desired that the celluloseparticles have enhanced or decreased hydrophobic or hydrophilicproperties.

Thus, the hydrophobic cellulose particles useful in the compositions ofthis invention may be treated with additional hydrophobic agents orhydrophilic agents, thus further enhancing hydophobic and/or hydrophilicproperties respectively, as desired. Hydrophobic agents may include butnot limited to low water soluble organic compounds such as long chainfatty acids or esters such as stearic acid, oleic acid, castor oil,isododecane, silicone, and their derivatives, non-water solublepolymers, e.g. high molecular weight methylcellulose and ethylcellulose,and high molecular water insoluble fluoropolymers etc., polymerizedsiloxanes or polysiloxanes with the chemical formula [R2SiO]n, where Ris an organic group such as methyl, ethyl, or phenyl, such asdimethicone, dimethicone copolyol, dimethicone ester; methicone andtheir derivatives. Hydrophilic agents such as water soluble polymers,e.g. low molecular weight methyl cellulose or hydroxypropyl methylcellulose (PMC); sugars, e.g. monosaccharides such as fructose andglucose, disaccharides such as lactose, sucrose, or polysaccharides suchas cellulose, amylose, dextran, etc. and low molecular polyvinylalcohol, and hydrated silica may also be used to enhance the hydrophilicproperties of the cellulose particles used in the compositions of thisinvention.

It also was found that the textures of the compositions formulated withthe hydrophobic linear cellulose particles of this invention are“fluffy”, silky and soft and aesthetically pleasing to the touch duringand after the application. The term “fluffy” as used herein refers tothe bulk density of the hydrophobic linear cellulose particles useful inthe compositions of this invention. The bulk density of the hydrophobiclinear cellulose particles useful in the compositions of this inventionis preferably from about 0.1 to about 2 (g/cm³), more preferably fromabout 0.15 to about 1.8 g/cm³, and most preferably from about 0.15 toabout 1.6 g/cm³. Preferably, the cellulose particles useful in thecompositions of this invention are present in the compositions in anamount of from about 1 to about 20% by weight of the compositions, morepreferably from about 1 to about 10% by weight of the compositions andmost preferably in an amount of from about 1 to about 6% by weight ofthe compositions.

Methods of Cleansing and Conditioning the Skin or Hair

The methods of this invention also relate to methods of cleansing andconditioning the skin or hair with a personal cleansing product of thepresent invention. These methods comprise the steps of wetting withwater a substantially dry, disposable, single use personal cleansingproduct comprising a water insoluble substrate, a lathering surfactant,and a conditioning component, and contacting the skin or hair with saidwetted product. In further embodiments, the methods and compositions ofthis invention are also useful for delivering various active ingredientsto the skin or hair.

The compositions of this invention may be substantially dry and may bewetted with water prior to use. The product may be wetted by immersionin a container filled with water or by placing it under a stream ofwater. Lather may be generated from the product by mechanicallyagitating and/or deforming the product either prior to or during contactof the product with the skin or hair. The resulting lather is useful forcleansing and conditioning the skin or hair. During the cleansingprocess and subsequent rinsing with water, the conditioning agents andactive ingredients are deposited onto the skin or hair. Deposition ofconditioning agents and active ingredients are enhanced by the physicalcontact of the substrate with the skin or hair.

The invention will be further described by reference to the followingexamples in order to further illustrate the present invention andadvantages thereof. These examples are not meant to be limiting butillustrative.

The compounds are indicated, depending on the case, as their CTFA nameor their chemical name, and the percentages are given on a weight basis,except where otherwise mentioned.

Example 1 Characterization of Hydrophobic and Hydrophilic LinearCellulose Fibers

Hydrophobic cotton particles and Hydrophilic Cotton particles listed inTable 1 below were characterized as followed:

Materials:

TABLE 1 Materials Squalene DI Water Hydrophobic Linear HydrophobicParticles #1 Cotton Particles (available from Goonvean of CornwallEngland) Hydrophobic Linear Hydrophobic Particles #2 Cotton Particles(available from IFC of North Tonawanda, NY) Hydrophilic CottonHydrophilic Particles #1 Particles (available from Resources of Natureof South Plainfield, NJ)

Example 1A Particle Size Measurement

The particle size of the cellulose materials was determined byMie/Fraunhofer Laser Scattering method using a Malvern Hydro 2000SParticle Size Analyzer by the following procedure:

-   -   1. Ensured the cell windows and lenses are clean and free from        scratches.    -   2. Flushed (using de-ionized water) and drained the accessory at        least 2 times in order to eliminate any contamination from        previous samples.    -   3. Turned off the pump/stirrer and turned on the ultrasonics for        30 seconds to allow for air bubbles to dissipate.    -   4. Filled the dispersion unit with DI water. Adjusted the        pump/stirrer speed to 2100 rpm, and then turned off the pump for        about 3 seconds to allow the air to dissipate. Then slowly        turned the pump back on to 2100 rpm. Toped up the water in the        dispersion unit to replace the volume of air displaced.    -   5. Added 4 drops of 5% IGEPAL CA 630 (non ionic detergent) in        the tank and allow dispersing before measuring the background.        If this concentration causes bubble formation, cleaned the unit        and repeat the procedure using 2 drops of surfactant. To ensure        the background give a clean value. Follow the 2-150 and 20-20        rule (First two detectors should have light intensity less than        150 units and the detector number 20 should have light intensity        less than 20 units)    -   6. When the system was clean, added diluted sample to be        measured in the dispersion unit in an amount of about 2 mg in 10        grams water.    -   7. When the obscuration caused by the particles in the sample is        2 to 5%, start the measurement. Note D50 and D90 in microns.        (D50 refers to 50% of the particles are less than the value; D90        refers to 50% of the particles are less than the value)    -   8. The experiment was repeated three times and the average of        the three results was recorded as the final value.

The average particle size of various cellulose particles outlined inTable 1 was determined and shown in Table 2.

TABLE 2 Particle Size Particle Size Particle Size D90 (microns) D80(microns) D50 (microns) Hydrophilic Cotton 170 125 70 ParticlesHydrophobic Linear 500 200 55 Cotton Particles (Hydrophobic #1)Hydrophobic Linear 270 125 50 Cotton Particles (Hydrophobic #2)

Example 1B Contact Angle

The contact angles of various cellulose particles outlined in Table 1were determined as follows:

40 Grams of the cotton particles shown in Table 1 were placed in aparticle sample holder; the surface was compressed with a consistentforce to create a smooth and compact surface of the particles. 500 μlmicro syringe filled with test liquid (water), 0.52 mm needle was usedto dispense and deposit 5 μl droplets on the surface. Contact Angles ofthe droplet on each of the cotton particle samples were measured andcalculated with Video-based DataPhysics optical contact angle measuringsystem OCA 20 with software SCA20 from three replicate tests on eachsample, results are shown in Table 3.

TABLE 3 Initial Water Contact Angle Material (degrees) HydrophobicLinear Cotton 136.2 (5.8)* Particles (#2) Hydrophilic Cotton 39.1 (4)* Particles Hydrophobic Linear Cotton 122.3 (3.2)* Particles (#1)*represents standard deviation

As shown in Table 3, hydrophobic cotton particles exhibited a largerwater contact angle compared to the hydrophilic cotton particles.

Example 1C Infrared Spectra

Infrared spectrum analysis was performed on three cotton particles asfollows:

Solvent extraction of the cotton materials using methylene chloride wasconducted and followed by IR analysis of the evaporated residues andforth in FIGS. 1 and 2 hereto.

The spectra (shown in FIGS. 1 and 2) showed extract residues from thetwo hydrophobic linear cotton particles (#2 and #1) along with adimethicone reference spectrum.

Solvent extractions of the two hydrophobic cotton materials (#2 and #1)showed a significant amount of waxy semi-solid residue, and relativelylittle from the hydrophilic cotton materials. It is believed that thiswaxy semi-solid residue coating is responsible for the hydrophobicnature of these two hydrophobic cotton particles.

Infrared analysis of the #2 and #1 hydrophobic cotton residues showsthem both to contain silicone (dimethicone or related polymer) alongwith other components. The #2 residue includes a long chain hydrocarbonwax-like material (as indicated by split peaks around 1375 and 725 cm−1)while the #1 residue includes an ester component (as indicated by IRpeaks around 1735 and 1250 cm−1).

The hydrophilic cotton particles (Virgin Cotton Flock) showed negligibleextractable residue. The morphology of this material was significantlydifferent from the other two materials indicating a higher degree ofprocessing, reducing much of the cotton fiber into a fine powderymaterial. The hydrophilic nature of this material is likely due to theinherent absorbent properties of cotton, and the lack of a repellantfinish treatment.

Further, Infrared analysis showed that all three cotton materials aretypical “cellulosic” materials. Characterization of the three differentcotton materials showed the hydrophobic (#2 and #1) being composed of asilicone based hydrophobic treatment. In contrast, the hydrophiliccotton lacks of the silicone based hydrophobic repellant treatment.

Example 2 Specific Surface Area

Inverse Gas Chromatography (IGC) has been reported in various papers asa good method to determine isotherms at finite concentration and ambienttemperatures, using organic probe molecules. (Thielmann, F., Burnett, D.J. and Heng, J. Y. Y. (2007) Determination of the surface energydistributions of different processed lactose. Drug Dev. Ind. Pharm. 33,1240-1253. And see also Yla-Maihaniemi, P. P. et al. (2008) Inverse gaschromatographic method for measuring the dispersive surface energydistribution for particulates. Langmuir, 24, p9551-9557.

Specific surface area was determined with IGC using octane by measuringthe octane adsorption isotherms at 30° C. and 0% RH. The results ofthese determinations are shown in Table 4. “BET” is a measurement ofspecific surface area known to those of ordinary skill in the art.

TABLE 4 Specific surface areas of particles (BET/IGC) Sample Surfacearea (m²/gr.) Hydrophilic Cotton Particles 1.4 Hydrophobic Linear Cotton1.23 Particles (#1) Hydrophobic Linear Cotton 1.6 Particles (#2)

Example 3 Absorption Capacity and Retention

The absorption capacity of olive oil by the dry cotton particles inTable 1 was measured in standard conditions (i.e. ambient temperatureand pressure). The saturated particles were also subjected tocentrifugal force to measure their retention power.

When porous media containing liquid is subjected to a force, the liquidis gradually evacuated from large pores then from increasingly smallpores as pressure increases. Media containing a high pore volumedistribution of smaller pores (or effective pores) can retain moreliquid under higher constraint and this retentive power may be a usefulfeature when the desired role of the media is to retain a liquid (spongeeffect).

In order to evaluate the retentive power of the particle, over-saturatedoil/particle combinations were subjected to centrifugal force (8000 rpm,300 seconds) and remaining oil was measured. The results of thismeasurement are shown in Table 5.

After acceleration, the remaining oil can be expressed as a proportionof the amount of the saturating oil (=mass of oil remaining/mass of oilinitially in the blend) or else one can express the amount of oilremaining as a mass fraction of the particle/oil mix (=mass of oilremaining/mass of the particle/oil complex). Both calculations mayprovide different insights and are expressed in the following table.

TABLE 5 Absorption Capacity and Retention of glyceryl trioleate (oliveoil) on Cotton Particles. Absorption capacity of Retention @ Retention @olive oil 8000 rpm (% of 8000 rpm (% of Sample (% w/w) saturation)blend) Hydrophilic 130 14 16 Cotton Particles Hydrophobic 445 14 38Linear Cotton Particles (#1) Hydrophobic 322 7 18 Linear CottonParticles (#2)

The two Hydrophobic Linear Cotton particles (#1 and #2) demonstratedvery high absorption of oil in the dry, loosely packed state. Further,the Hydrophobic Linear Cotton Particles (#1) retained a high amount oftriglyceride even under applied acceleration.

Example 4 Speed of Oil Absorption

The speed of oil absorption by a material may be determined byProcedures as follows:

A template of a 6×4 cm rectangle was cut from a 0.25 mm thick paper.With a 4×2 cm rectangle window cut in the middle with 1 cm of paperaround the edge of the window. A glass microscope slide was weighed andits mass recorded. The template was placed on the slide and the testmaterial dispensed in the window of the template. The material wasspread across the window with a metal spatula to create an evenrectangular layer with a mass of ˜0.24 g (±0.01 g). The template wascarefully removed, edges of the slide cleaned off with a spatula orgloved fingertip as necessary, and the mass of the slide+materialrecorded. The slide (with oil-absorbing particle layer) was placed flatin an incubator at 32° C. 0.0858 g of the sebum component of interestwas dispensed via 0-100 μL pipette (liquids) to the slide at one side ofand in contact with the particle layer. (For squalene, 100 μL was used;for triolein, 94.3 μL was used based on suppliers' stated densities).The slide was left undisturbed in the incubator for 15 seconds forfollow-up test), with a timer started just as the drop was dispensed.After 15 seconds, the slide was removed from the incubator and anyunabsorbed sebum component was carefully wiped from the slide using aKimwipe. The slide was weighed to determine the amount of the sebumcomponent absorbed by the particles during the absorbance period. TheSteps above were repeated for each slide, with each sebumcomponent/particle combination tested at least in triplicate. Ratioswere calculated to show the mass of sebum component absorbed per mass ofoil-absorbing particle within 15 seconds. The results of thisdetermination are set forth in FIG. 3 hereto.

FIG. 3 demonstrates that cotton particles (#1 cotton particles) absorbsboth squalene and triglyceride much faster than hydrophilic cottonparticles.

Example 5 Speed of Water Absorption

The speed of water absorption of materials was determined by theprocedure set forth as follows:

A gravimetric absorption test (GAT) Method was used to determine thewater absorption kinetics of hydrophobic cotton particles vs.hydrophilic cotton particles. The cotton particles sample was loadedinto a small cylinder container, and the water was introduced in contactwith the cotton particles through a water reservoir on a scale, thechange in water weight arising from water transfer or absorption bycotton particles was recorded electronically by a computer over thestudy duration. The absorption rate was calculated and plotted fordifferent cotton particles samples.

As shown in FIG. 4, hydrophobic cotton particles had a slower waterabsorption rate than hydrophilic cotton particles.

Example 6 Water Absorption Capacity and Oil Absorption Capacity

The water absorption capacity and oil absorption capacity of materialsmay be determined by the following procedures set forth below inExamples 6A and 6B.

Each experiment was repeated in triplicate for #1 hydrophobic cottonparticles, hydrophilic cotton particles (#1), and #2 hydrophobic Ctctonparticles.

Example 6A Measurement of Hydrophobicity and Oil Absorption

The scale was tared with the particle samples. Squalene was then addeddrop by drop via disposable pipette until the sample looked nearlysaturated. A metal spatula was used to completely mix in the oil withthe particles until saturated. (After mixing, the spatula was wipedclean against the side of the weigh boat to ensure there was no loss ofmaterial). “Saturation” as used herein is defined as the mixture beingable to hold all the available squalene such that the bottom of the boatappeared dry. This determination was based on the appearance of themixture and the condition of the weigh boat. The total number of gramsof squalene was recorded and the relative Oil Absorption ratio wascalculated by dividing the total weight of oil by the total weight ofcotton materials. The results of performing this procedure are set forthin FIG. 5 hereto.

Example 6B Measurement of Water Absorption

Following a method similar to that described in example 6A, butsubstituting water for the oil material, water absorption was measured.The results of this test are set forth in FIG. 6.

Example 7 Cleansing Compositions

TABLE 6 INCI Name Example 7a Example 7b Example 7c Example 7d Example 7eExample 7f Water QS QS QS QS QS QS Glycerin 0.00-15.00  0.00-15.00 0.00-15.00  0.00-15.00  0.00-15.00  0.00-15.00 Acrylates Copolymer0.00-12.00 — — — — — Acrylates/C10-30 — — — — 0.00-1.00 — Alkyl AcrylateCrosspolymer Carbomer — — — — — 0.00-1.00 Xanthan Gum — — — 0.00-2.00 —— Sodium Laureth 0.00-40.00 — — —  0.00-40.00  0.00-40.00 Sulfate DecylGlucoside —  0.00-14.00 —  0.00-14.00 — — Lauryl Glucoside —  0.00-17.00— —  0.00-17.00  0.00-17.00 Ammonium Laureth —  0.00-16.00 — — — —Sulfate Cocamidopropyl 0.00-17.00 — —  0.00-17.00  0.00-17.00 0.00-17.00 Betaine Cocamide MEA — 0.00-1.00 — — — — Glycereth-7 —0.00-5.00 — — — — PPG-2 Hydroxyethyl — — — 0.00-2.00 — — Cocamide PEG-16Soy Sterol — — — 0.00-2.00 0.00-2.00 0.00-2.00 PEG-120 Methyl —0.00-1.60 0.00-2.00 — — — Glucose Dioleate PEG-80 Sorbitan — — 0.00-3.00— — — Laurate Cocamidopropyl PG — — 0.00-2.00 — — — dimonium ChloridePhosphate Sodium C14-16 Olefin — —  0.00-40.00 — — — Sulfonate Disodium— — 0.00-5.00 0.00-5.00 — — Lauroamphodiacetate Sodium Cocoyl — —0.00-5.00 — — — Sarcosinate C12-15 Alkyl Lactate — — 0.00-1.00 — — —Glycol Stearate — 0.00-2.00 — — 0.00-2.00 0.00-2.00 Glycol Distearate —— — — 0.00-2.00 0.00-2.00 Laureth-4 — — — — 0.00-2.00 0.00-2.00Salicylic Acid — — 0.00-2.00 — — — EDTA 0.00-0.40  0.00-0.40 0.00-0.400.00-0.40 0.00-0.40 0.00-0.40 Preservative 0.00-2.00  0.00-2.000.00-2.00 0.00-2.00 0.00-2.00 0.00-2.00 Citric Acid QS to QS to QS to QSto QS to QS to adjust pH adjust pH adjust pH adjust pH adjust pH adjustpH Sodium Hydroxide QS to QS to QS to QS to QS to QS to adjust pH adjustpH adjust pH adjust pH adjust pH adjust pH Polyethylene 0.00-2.00 0.00-2.00 0.00-2.00 0.00-2.00 0.00-2.00 0.00-2.00 Fragrance 0.00-1.00 0.00-1.00 0.00-1.00 0.00-1.00 0.00-1.00 0.00-1.00 Cotton Particles0.00-20.00  0.00-20.00  0.00-20.00  0.00-20.00  0.00-20.00  0.00-20.00Hydrophobic Cotton Particles 0.00-20.00  0.00-20.00  0.00-20.00 0.00-20.00  0.00-20.00  0.00-20.00 Hydrophilic

Cleansing compositions of this invention set forth in Table 6 above maybe made in accordance with the following procedure:

-   -   1. Add water to a vessel and begin mixing.    -   2. Add Acrylates copolymer or acrylates/C₁₀₋₃₀ Alkyl Acrylate        Crosspolymer or Carbomer or Xanthan Gum to the vessel and mix        until completely dispersed.    -   3. Neutralize Carbomer with sodium hydroxide.    -   4. Add Sodium Laureth Sulfate and/or Decyl Glucoside and/or        Lauryl Glucoside and/or Ammonium Laureth Sulfate to the vessel.    -   5. Add Cocamidopropyl betaine (pre-dispersed salicylic acid, if        necessary, in cocoamidopropyl betaine) and/or Cocamide MEA        and/or Glycereth-7 and/or PPG-2 Hydroxyethyl Cocamide and/or        PEG-16 Soy Sterol and/or PEG-120 Methyl Glucose Dioleate to the        vessel.    -   6. Add PEG-80 Sorbitan Laurate and/or Cocamidopropyl PG dimonium        chloridephosphate and/or Sodium C14-16 Olefin Sulfonate and/or        Disodium Lauroamamphodiacetate and/or Sodium cocoyl Sarcosinate        and/or PEG-120 Methyl Glucose Dioleate to the vessel and mix.    -   7. Add Glycol Stearate and/or Glycol Distearate and/or Laureth-4        and/or C12-15 Alkyl Lactate and mix the ingredients.    -   8. Add EDTA and Preservative to the vessel and mix.    -   9. Add polyethlene and fragrance and mix.    -   10. Adjust the pH of the formulation to the desired pH using        sodium hydroxide and/or citric acid.    -   11. Add hydrophobic cotton particles and/or hydrophilic cotton        particles to the mixture.

Example 8 Sebum Absorption Study Using Cleansing Composition

A baseline reading of sebum quantity was taken from selected skintesting sites on the skin surface of nine subjects (Threepoints—opposite ends and in the middle of the forehead) prior to wettingthe skin with water from running faucet. The sebum quantity was measuredusing a sebumeter. 0.5 cc gel Cleanser (placebo) was applied to skinthen the skin massaged for ten seconds. Water was added to the skin andthe skin was lathered for additional twenty seconds. Cleanser was rinsedfrom the skin and any excess residue with water for thirty seconds thenblot dried with a Kimwipe.

These steps were repeated with hydrophobic and hydrophilic cottonparticles as shown in Table 8 and excess moisture permitted to air dryfor about five minutes.

After washing by taking two points spaced out for both the placebo andcotton prototype, sebum count was measured with a sebumeter cartridgeconsecutively 4 hours and 6 hours after washing, respectively.

For accuracy, each sebum count should be conducted on a fresh skin area(i.e. the same area cannot be measured more than once). Once sebum ismeasured by the sebumeter cartridge, that particular site will have beendisrupted so as to affect accuracy of the measurement of sebum as sebumis produced throughout the day on the skin.

Results of the sebum absorption measurements for Example 9A and 9B areset forth in FIG. 7 hereto (Example 9C was not tested in this example).As can be observed from the graph in FIG. 7, sebum production of skincleansed with composition containing hydrophobic and hydrophilic cottonparticles was slowed as compared with that cleansed with a gel cleanser.

TABLE 8 Example 9B Example 9C Example 9A Hydrophilic Hydrophobic (GelCleanser) Cotton Cotton CTFA/INCI Name % w/w % w/w % w/w Water 54.0848.71 49.26 Sodium Laureth 29.00 29.00 29.00 Sulfate; Water Glycerin3.00 3.00 3.00 Cocamidopropyl 4.00 4.00 4.00 Betaine Sodium Hydroxide0.32 0.32 0.32 Disodium EDTA 0.20 0.20 0.20 Phenoxyethanol 1.00 0.000.00 (and) Caprylyl Glycol Phenoxyethanol; 0.28 0.00 0.00 Methylparaben;Ethylparaben; Propylparaben Phenoxyethanol 0.00 0.60 0.60 CaprylylGlycol 0.00 0.00 0.50 (and) Caprylhydroxamic Acid Phenoxyethanol 0.000.80 0.00 (and) Caprylyl Glycol Chlorphensin 0.00 0.25 0.00 Citric Acid0.12 0.12 0.12 Cotton Particles 0.00 5.00 0.00 Cotton Particles 0.000.00 5.00 Acrylates 8.00 8.00 8.00 Copolymer 100.00 100.00 100.00

1. A rinse-off skin care composition, comprising: hydrophobic, linearcellulose particles having an average length of from about 1 to about1000 μm, a particle aspect ratio from about 1000 to about 2 and athickness of from about 1 to about 500 μm; at least one cleansing agentselected from the group consisting of a saponified fat and a surfactant;and a cosmetically acceptable carrier.
 2. A rinse-off skin carecomposition according to claim 1 wherein said hydrophobic, linearcellulose particles have an oil absorption capacity and retention offrom about 150 to about 500% weight oil/weight particles.
 3. A rinse-offskin care composition according to claim 2 wherein said oil absorptioncapacity and retention of said hydrophobic, linear cellulose particlesis from about 300 to about 500% weight oil/weight particles.
 4. Arinse-off skin care composition according to claim 1 wherein the watercontact angle of said hydrophobic, linear cellulose particles is greaterthan about 90 degrees.
 5. A rinse-off skin care composition according toclaim 4 wherein said water contact angle is greater than about 100degrees.
 6. A rinse-off skin care composition according to claim 4wherein said water contact angle is greater than about 120 degrees.
 7. Arinse-off skin care composition according to claim 1 wherein saidhydrophobic, linear cellulose particles are derived from cotton.
 8. Arinse-off skin care composition according to claim 1 wherein saidhydrophobic, linear cellulose particles are coated with a hydrophobicagent selected from the group consisting of metal soap, organic wax,synthetic wax, long-chain fatty acids, long-chain fatty esters,non-water soluble polymers, high molecular water-insolublefluoropolymers, and polymerized siloxanes.
 9. A composition according toclaim 1 wherein said surfactant is selected from the group consisting ofanionic, nonionic, and amphoteric surfactants.
 10. A rinse-offcomposition according to claim 1 wherein said hydrophobic, linearcellulose particles are cotton.
 11. A rinse-off composition according toclaim 10 wherein said hydrophobic, linear cotton particles areregenerated cotton.
 12. A rinse-off composition according to claim 1wherein said hydrophobic, linear cellulose particles are rayon.
 13. Arinse-off composition according to claim 1 wherein said compositioncomprises from about 1 to about 20 percent by weight of saidhydrophobic, linear cellulose particles.
 14. A rinse-off compositionaccording to claim 1 wherein said composition comprises from about 1 toabout 10 percent by weight of said hydrophobic, linear celluloseparticles.
 15. A rinse-off composition according to claim 1 wherein saidcomposition comprises from about 1 to about 6 percent by weight of saidhydrophobic, linear cellulose particles.